SessionInstaller: Open write sessions with packageName only

This allows to open same sessions multiple times when required untill it's
abandoned. Also specifiy file length as it is known.

Signed-off-by: Aayush Gupta <aayushgupta219@gmail.com>

app/src/main/java/com/aurora/store/data/installer/SessionInstaller.kt

@@ -139,7 +139,7 @@ class SessionInstaller(context: Context) : InstallerBase(context) {
             Log.i("Writing splits to session for $packageName")
             getFiles(packageName, versionCode, sharedLibPkgName).forEach {
                 it.inputStream().use { input ->
-                    session.openWrite("${sharedLibPkgName.ifBlank { packageName }}_${System.currentTimeMillis()}", 0, -1).use { output ->
+                    session.openWrite(sharedLibPkgName.ifBlank { packageName }, 0, it.length()).use { output ->
                         input.copyTo(output)
                         session.fsync(output)
                     }